静止无功发生器负载不平衡补偿范围研究

静止无功发生器负载不平衡补偿范围研究

郑征;王沁东;张国澎

【期刊名称】《电源学报》 【年(卷),期】2018(016)003

【摘要】In this paper,a three-phase full-bridge static var generator(SVG)is applied to compensate the reactive pow-er and negative-sequence current in low-power applications. A sequence control strategy with d-q biordered synchronous rotating is adopted: to stabilize the DC voltage of the system, the relationship between the reactive current of SVG compensation and negative-sequence current is analyzed, showing that the compensation range of negative-sequence current is not limited by the positive-sequence component. When compensating the rated positive-sequence reactive current, the maximum three-phase output voltage is used to measure the maximum compensation range of negative-sequence current. When the grid-connected system's reactance takes a value of 5 mH, calculations indicate that the maximum ratio of positive to negative sequence will not exceed 43%. Finally, a system simulation model is built in Matlab/Simulink, and simulation results verify the correctness of the control strategy and the calculation method for unbalance compensation range.%三相全桥静止无功发生器SVG(static var generator)应用于低压小功率中无功与负序电流的补偿.本系统采用d-q双序同步旋转的分